Ark-0
Ark-0 is a test network for trying things out. It may be reset at any time.

Block 18218

Hash
000000b4349c530fcd0790ca2374a7dcfe6b969c5b0800c285ce720fdd421c9a
Confirmations
23901
Time
2026-10-09 02:56:05 UTC
Median time
2026-10-09 02:47:41 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
8887e3d2190b14c1969449b09c4c0f19da4fbb6b9a00b40be86e5b08a6f36a7e
Previous block
00000055f27fcc373895530286a37d86e41ecefe811e19db387d3fa2dd629964
Next block
000000c1d58c4b783599379baf5f6809446394cd31fa07c321c91b65bba0c2bc

ML-DSA-44 block signature (M2)

M2 is an experimental rule of this test network. From a height set in its build, a node that enforces M2 accepts a block only if, besides the classical signet signature, the block carries a valid ML-DSA-44 signature by the Ark-0 block key, in its coinbase's witness commitment output. This page shows that signature; it does not check it.

Block 18218 is below the activation height 20000: nodes do not require this signature, and only log the result of checking it when run with -debug=validation. The block producer adds it from height 18000 on, so that nodes can check it before it is required.

Status
In the form M2 requires, followed by the signet solution push (the classical signature)
Signature
1de79fd1d001c0b15d4bbfe3dfbb8ce0… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
8887e3d2190b…5b08a6f36a7e coinbase1250